8-hydroxy-2-methyl-6,7-methylenedioxy-1,2,3,4-...

Details 8-hydroxy-2-methyl-6,7-methylenedioxy-1,2,3,4-... 8-hydroxy-2-methyl-6,7-methylenedioxy-1,2,3,4-...

C - Chemistry, Metallurgy

07

D

260/275.5

C07D 491/056 (2006.01) C07D 491/04 (2006.01)

Patent

CA 1300147

ABSTRACT A tetrahydroisoquinoline derivative represented by the following general formula; Image wherein R1 represents hydrogen atom or methyl group, and X1, X2, Y1 and Y2 are defined as follows: (1) X represents -OH, -OCCH3 or OR wherein R2 represents lower alkyl group, when X2,Y1 and Y2 represent hydrogen atom; (2) X1 and X2 are jointed together to represent oxo group (=O), when Y1 and Y2 represent hydrogen atom, or (3) Y1 and Y2 are jointed together to represent oxo group (=O), when X1 and X2 represent hydrogen atom, which is useful as an intermediate in preparation of Cotarnine. - 40 -

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